Improvement in the modes of fastening cutters in stone-cutters and other tools



G. STACY.

Modes of Fastening G u ffers in Stone Cutters and other Tools.

Patented Nov. 18, 1873.

i V M Per% Attorneys.

UNITED STATES PATENT QFFICE.

GEORGE STACY, OF NANUET, NEW. YORK.

IMPROVEMENT IN THE MODES 0F FASTENING CUTTERS IN STONE-CUTTERS AND OTHERTOOLS.

Specification forming part of Letters Patent No. 144,639, dated November18, 1873 application filed June 21, 1873.

To all whom it may concern:

Be it known that I, GEORGE STACY, of Nanuet, in the county of Rocklandand State of New York, have invented a new and useful Improvement inFastening for Stone-Cutters, &c., of which the following is aspecification;

Figure 1 represents my improved fastening as applied to the cutter andstock of a stonecutting machine. Fig. 2 represents the fastening asapplied to a drill. Fig. 3 represents the fastening as applied to astone-hammer.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved fastening forsecuring points, blades, cutters, &c., in stocks, drills, hammers,stonecutting tools, iron-workers tools, cold-chisels, planer-points, andvarious similar tools where a convenient detachment and secure fasteningare required. The invention consists in acavity formed in one side ofthe recess that receives the cutter or similar tool to be fastened, andmade in the shape of a segment of .a hollow cylinder, and a keycorrespondingly shaped upon one side to fit into said cavity, and flatupon its other side, as hereinafter fully described.

slightly tapering, toward one end; and its peculiar construction enablesits straight side to fit against a straight or an inclined or taperingside of the tool to be held. In the drillstock F (shown in Fig. 2) therecess Bis made wider than the cutter G, the extra space being occupiedby a plate, H placed upon the opposite side of the cutter G from the keyE. This enables the cutter or point G to be conveniently centered byvarying the relative thickness of the key E and plate 11.. In thestone-hammer I (shown in Fig. 3) the side of the recess B opposite thecavity D is made inclined or beveling to allow a beveled plate, J, to beplaced upon the side of the cutter K. That face of the recess B oppositethe key E, and against which the cutter O or similar tool is to besecured, may be fiat, angular, curved, or formed in any shape to fit acorresponding form in the said cutter or similar tool to be secured.

This construction allows the position or line of the cutter or point tobe adjusted as circumstances may require.

The fastening herein described is applicable to very many uses notenumerated, but in all of which the peculiar cavity D and key E may beemployed.

The method of fastening the cutter-tool here described is shown in anapplication for a patent for improvement in stone-cutters filed May 31,1873, and of which this is a division.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The cavity D, formed in one side of the recess thatreceives the cutter or similartool to be fastened, and made in the shapeof a segment of a hollow cylinder, and a key, E, correspondingly shapedupon one side and flat upon its other side, substantially as hereinshown and described.

Witnesses: GEORGE STACY.

JAMES T. GRAHAM, T. B. MosHER.

